Sven Burgener <[EMAIL PROTECTED]> wrote: >What are each of the following lines for and thus which can be commented >out by me? > >-- inetd.conf snippet -- >#echo stream tcp nowait root internal >#echo dgram udp wait root internal
Echo, returns the packet sent to it (RFC 862). >#chargen stream tcp nowait root internal >#chargen dgram udp wait root internal Character Generator, sends you a stream of some undefined data, preferably data in some recognizable pattern (RFC 864). >discard stream tcp nowait root internal >discard dgram udp wait root internal Discard, throws away anything sent to it, just like /dev/null (RFC 863). I'd imagine that any of the above three might be used in denial of service attacks, though I'm not a security expert. >daytime stream tcp nowait root internal >#daytime dgram udp wait root internal Daytime, sends the current date and time as a character string (RFC 867). >time stream tcp nowait root internal >#time dgram udp wait root internal Time, sends the time in seconds since midnight on 1 January 1900 (RFC 868). NTP (Network Time Protocol) may be considered better for these two. I don't think you actually need any of these; they're all commented out on my system with no ill effects. You'll find all the RFCs mentioned above in the doc-rfc package if you're interested, as well as STD1 which is useful for finding relevant RFCs. -- Colin Watson [EMAIL PROTECTED]
